Bosch GDS 18V-450 HC Professional Notice Originale page 18

18 | English
The working procedure is divided into two phases:
Screwing in and tightening (impact mechanism in action).
The impact mechanism is activated as soon as the screwed
connection runs tight and load is therefore put on the motor.
The impact mechanism then converts the power of the mo-
tor to steady rotary impacts. When loosening screws or nuts,
the process is reversed.
Starting Operation
Inserting the battery
Note: The use of batteries unsuitable for your power tool can
lead to malfunctions or damage to the power tool.
Push the charged battery (5) into the base of the power tool
until the battery is securely locked.
Set the rotational direction (see figure D)
The rotational direction switch (2) is used to change the ro-
tational direction of the power tool. However, this is not pos-
sible while the on/off switch (8) is being pressed.
Right rotation: To drive in screws and tighten nuts, press
the rotational direction switch (2) through to the left stop.
Status indications
Status indicator for power Meaning/cause
tool (11)
Green Status OK
Yellow Critical temperature has been reached or re-
chargeable battery is almost empty
Illuminated red Power tool has overheated or rechargeable
battery is empty
Flashing blue Power tool is connected to a mobile device or
settings are being transferred
Speed preselection
With the speed preselection button (15), you can preselect
the required speed in three stages. Press button (15) as of-
ten as needed until the required setting is indicated in the
speed indicator (16). The selected setting will be saved.
You can also preselect the speed using the Bosch Toolbox
app.
The required speed depends on the material and the work-
ing conditions; it can be ascertained through practical tests.
The information in the table below describes the recommen-
ded values.
Basic speed setting at level
1
[min
Number of speed settings
0–1 000 0–1 500 0–2 300
3
You can use the button for speed preselection (15) to
preselect the required speed, even during operation.
1 609 92A 7YM | (31.05.2022)
Left Rotation: To loosen and unscrew screws and nuts,
press the rotational direction switch (2) through to the right
stop.
Adjusting the Speed/Impact Rate
You can adjust the speed/impact rate of the power tool when
it is on by pressing in the on/off switch (8) to varying ex-
tents.
Applying light pressure to the on/off switch (8) results in a
low rotational speed/impact rate. Applying increasing pres-
sure to the switch increases the speed/impact rate.
Switching on/off
To start the power tool, press and hold the on/off switch
(8).
The worklight (14) lights up when the on/off switch (8) is
lightly or fully pressed, allowing the work area to be illumin-
ated in poor lighting conditions.
To switch off the power tool, release the on/off switch (8).
User interface (see figure C)
The user interface (7) is used to preselect the speed and
working mode and to indicate the status of the power tool.
Selecting the working mode
The power tool has two preset working modes A and B (12).
You can also programme working modes for different applic-
ations and adjust existing modes via the Bosch Toolbox un-
der A and B (12).
To switch between the working modes A and B (12), press
button (13).
Practical advice
u
u
2 3
-1 -1 -1
] [min ] [min ]
The torque depends on the impact duration. The maximum
achieved torque results from the sum of all individual
torques achieved through impact. Maximum torque is
achieved after an impact duration of 6–10 seconds. After
this duration, the tightening torque increases only minimally.
The impact duration is to be determined for each required
Solution
–
Run the power tool at no load and allow it to
cool down, or replace or charge the battery
soon
Allow the power tool to cool down, or replace
or charge the battery
–
Only apply the power tool to the screw/nut when the
tool is switched off. Rotating tool inserts can slip off.
The power tool with inserted Bluetooth
Module (accessory) is equipped with a radio inter-
face. Local operating restrictions, e.g. in aircraft or
hospitals, must be observed.
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